fix: labeler.yml for Estonia packager code (#11036)

This PR fixes a bug from
#11017 that
makes tests fail for all PRs.

```
 750 | :
-------^
 751 | - changed-files:
 752 |   - any-glob-to-any-file: 'scri ...
Error: incomplete explicit mapping pair; a key node is missed; or followed by a non-tabulated empty line (750:1)
```

.github/labeler.yml

@@ -747,7 +747,7 @@ Portugal:
   - any-glob-to-any-file: 'scripts/packager-codes/portugal-geocode.sh'
   - any-glob-to-any-file: 'scripts/packager-codes/portugal-concatenate-csv-sections.py'
 
-:
+Estonia:
 - changed-files:
   - any-glob-to-any-file: 'scripts/packager-codes/toidukaitlejad-tsv.xsl'